The Difference Between Worry and Concern

Concern is a feeling of worry or anxiety about something with which one is involved. It can also be a sense of responsibility for someone or something.
Example: She expressed her concern about the children's safety.
Synonyms: worry, anxiety, care, solicitude.
Antonyms: indifference, unconcern.

What is the difference between worry and concern ?
Worry is a persistent and often excessive preoccupation with something, while concern is a feeling of responsibility or interest in someone or something. Worry is often negative and can be debilitating, while concern is more neutral and can motivate one to take action.

Example: She was worried about her test results, but she was also concerned about her friend's well-being.

In this example, "worried" describes a persistent and excessive preoccupation with her test results, while "concerned" describes a feeling of responsibility for her friend's well-being.